My 407 originally had an rt. with satnav. This failed so I fitted an android head unit sourced from a large Asian supplier that only lasted less than a year. My call for warranty has been very silent . I haven’t found any business that can fault find . The specialist are just installers. Does anyone have a suggestion as to where I could get the unit repaired or failing that a supplier that is in Australia as I don’t want to deal with overseas because of possible warranty claims. I have to do something as I can’t control the climate control without an operating unit. Thanks in advance Keith